Ineed , i understand the concept i’m just lost on the eighth part. you, i will mark you as brainliest for

Explanation:

When you choose the first batter for a line-up, since there are 20 batters in the team, the first batter may be any out of 20.

Then, 19 batters remain, meaning that there are 19 choices for the second batter of the line-up.

There are 18 members left to choose from for the third batter.

For the fourth batter there are 17 choices remaining.

There are 16 people to choose from for the fifht batter, 15 options for the sixth batter, 14 for the seventh, and, finally, 13 for the eigth batter, which is what you are asked to determine.

it would open into a square depending on the type of envelope i’m not sure about the second part

i believe it’s 165 because if u add 137 and 58 u get 195 and then subtract that from 360 and there’s ur answer